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Recognised as Colour

#1991DD

  • #1991DD
  • Blue
  • Dark
  • Nearest: Cornflower blue

#1991DD is a blue with RGB values 25, 145, 221 and HSL 203°, 80%, 48%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#1991DD#1991DD
HEX#1991DD
RGBrgb(25, 145, 221)
RGB (0–1)0.098, 0.5686, 0.8667
RGB percentages9.8%, 56.9%, 86.7%
HSLhsl(203.3, 79.7%, 48.2%)
HSV / HSBhsv(203.3, 88.7%, 86.7%)
CMYK88.7%, 34.4%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,675,741
CSS custom property--colour: #1991DD;

Brightness & contrast

Relative luminance0.25678WCAG 2.x, 0 is black and 1 is white
Perceived brightness134.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.14:1
Contrast with white3.42:1WCAG normal text: Fail
Contrast with black6.14:1WCAG normal text: AA
Greyscale equivalent#7D7D7D
Inverted#E66E22

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6C94E0no red cones; affects about 1% of men; ΔE 12.5 from the original
Deuteranopia#5183DCno green cones; the most common form, about 1% of men; ΔE 15.1 from the original
Tritanopia#00A4ADno blue cones; rare, and affects men and women equally; ΔE 43 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.42:1WCAG large text: AA
Contrast with black, large text6.14:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 13.8Steel blue · ΔE 15.9Deep skyblue · ΔE 20.9Dodgerblue · ΔE 21.2Light skyblue · ΔE 29.8Sky blue · ΔE 35.5
Nearest named CSS colourCornflower blue (#6495ED)ΔE 13.8, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DD6519
Analogous#19DDC7, #192FDD
Triadic#DD1991, #91DD19
Split complementary#DD192F, #DDC719
Tetradic#C719DD, #DD6519, #2FDD19

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9E6F9
Lighter +30%#9BD1F4
Lighter +20%#6DBCEF
Lighter +10%#40A8E9
Darker −10%#1473AF
Darker −20%#0F5581
Darker −30%#093754
Darker −40%#041926
More saturated +25%#0097F6
Less saturated −25%#388ABE

Channel breakdown

R25
G145
B221
Red25 (9.8%)
Green145 (56.9%)
Blue221 (86.7%)
Hue203.27°
Saturation (HSL)79.67%
Lightness48.24%
Dominant channelBlue
Hex per channelR 19 · G 91 · B DD

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Every value on this page was computed from “1991dd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.